Stenosemus simplicissimus ( Thiele, 1906 )

Sirenko, Boris, 2023, A small collection of rare and new chitons (Mollusca: Polyplacophora) from the Tasmanian Museum and Art Gallery, Zootaxa 5325 (3), pp. 359-392 : 381

publication ID

https://doi.org/ 10.11646/zootaxa.5325.3.3

publication LSID

lsid:zoobank.org:pub:A1FD8DA8-A72C-41B9-8FD7-E0DCE2A1D3BD

DOI

https://doi.org/10.5281/zenodo.8247068

persistent identifier

https://treatment.plazi.org/id/03CD7E00-684D-696A-44FE-660AFBDDE8D3

treatment provided by

Plazi

scientific name

Stenosemus simplicissimus ( Thiele, 1906 )
status

 

Stenosemus simplicissimus ( Thiele, 1906) View in CoL

( Figures 23C, D View FIGURE 23 , 27–32 View FIGURE 27 View FIGURE 28 View FIGURE 29 View FIGURE 30 View FIGURE 31 View FIGURE 32 )

Ischnochiton (Chondropleura) simplicissimus Thiele, 1906: 335 View in CoL , pl. 29, figs. 21–25; 1908: 21; 1909: 112; E.A. Smith, 1910: 211; Barnard, 1963: 6.

Ischnochiton simplicissimus View in CoL ; Day, 1963: 6.

Ischnochiton (Stenosemus) simplicissimus View in CoL ; Kaas & Van Belle 1990: 67, fig. 27, map 1.

Stenosemus simplicissimus View in CoL ; Sirenko 1994: 164; Schwabe 2008: 71 (bibliography and description).

Type material. Holotype ( ZMB Moll 59908).

Type locality. South Africa, Cape of Good Hope , 318 m.

Material examined. Holotype, Southern Ocean , Heard Island, 52.3889°S, 72. 6272°E, Locality HIMI-Western Platean, 302 m, cruise SC 26, Haul N 161 B, 2 spms, BL 20.0 mm, ( TMAG, E 26179 View Materials ), 01.05.2003. GoogleMaps 52.5969°S, 71. 9952°E, Locality HIMI-Aurora Bank, 310 m, cruise SC 26, Mol 37, benthic sled, 6 spms, BL 10.0– 14.5 mm, ( TMAG, E 26178 View Materials ), 30.04.2003. GoogleMaps

Distribution. Stenosemus simplicissimus is wide distributed species in the South Ocean. It was found near South America (Shag Rocks near South Georgia Island), near Antarctica (eastern Weddell Sea), near South Africa (Cape off Good Hope) and Heard Island. The latest find has greatly expanded the range of this species. The species inhabits depth from 284 to 1064 m ( Schwabe 2008).

Remarks. Holotype (RMNH.MOLL.K.5155) has a somewhat glossy tegmentum, dorsal corpuscles with short longitudinal riblets in the upper part and with granules on the top. The studied specimens (BL 7.0 mm and 20.0 mm) from Heard Island have 9–10 longitudinal riblets on all dorsal surface of the corpuscles and have no granules on the top of the corpuscles. The larger specimen has 23 gills per side arranged from valve III to valve VII. The radula of the smaller specimen is 3.4 mm long and has 28 transverse rows of mature teeth.

ZMB

Museum für Naturkunde Berlin (Zoological Collections)

TMAG

Tasmanian Museum and Art Gallery

Kingdom

Animalia

Phylum

Mollusca

Class

Polyplacophora

Order

Chitonida

Family

Ischnochitonidae

Genus

Stenosemus

Loc

Stenosemus simplicissimus ( Thiele, 1906 )

Sirenko, Boris 2023
2023
Loc

Stenosemus simplicissimus

Schwabe, E. 2008: 71
Sirenko, B. I. 1994: 164
1994
Loc

Ischnochiton (Stenosemus) simplicissimus

Kaas, P. & Van Belle, R. A. 1990: 67
1990
Loc

Ischnochiton simplicissimus

Day, J. H. 1963: 6
1963
Loc

Ischnochiton (Chondropleura) simplicissimus

Barnard, K. H. 1963: 6
Smith, E. A. 1910: 211
Thiele, J. 1906: 335
1906
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF